Expansible packing drum for pump pistons and the like



HAWA-E Sept. 18, 1923.

G. c. DEAKINS ET Al.

EXPANSIBLE PACKING DRUM FOR l UMP PISTONS AND THE LIKE 2 Sheets-Sheet 1 Filed Nov. 11, 1919 1 I'NvEA ToFPs 6m er QZZ a/nm 19/4/7425. Name)" 2 Sheets-Sheet 2 G. C. DEAKINS ET AL EXPANSIBLB PACKING DRUM FOR PUMP PISTONS AND THE LIKE Filed Nov. 11, 1919 Sept 18 1923.

Patented Sept. 18, 1923.

UNli STES @FFHQE.

GROVER C. DEAKINS, OF ANAHEIM,

AND LELAND S. HAMER,

0F FULLERTON,

FORNIA, ASSIGNORS OF ONE-THIRD T0 BUDD D. MCALVAY, 0F ANAHEIM, CALI FORNIA, AND ONE-THIRD T0 ELIHU C. WILSON, 0]? LOS ANGELES, CALIFORNIA.

EXPANSIBLE PACKING DRUM FOR PUMP PISTONS AND THE LIKE.

Application filed November 11, 1919. Serial No. 337,330.

To all whom it may concern.-

Be it known that we, GRovnR C. DEAKINs and LELAND S. HAMER, citizens of the United States, residing at Anaheim and at Fullerton, respectively, in the county of Orange and State of California, have invented new and useful Improvements in Expansible Packing Drums for Pump Pistons and the like, of which the following is a.

specification;

This invention relates to apparatus and machines employing what is commonly termed as a piston, as for instance in pumps and engines of the reciprocating type, and has for its special object to provide for the adjustment of the packing of the piston in its cylinder without requiring the removal of the head or any part of the cylinder in which the piston may be mounted and also without requiring the removal of the pistonfrom its cylinder and which enables the adjustment of the packing to take up the wear irrespective of the position of the piston in its cylinder; and the invention consists of a construction and organization embodiments of which are illustrated in the accompanying drawings and described and claimed herein.

Figure 1 is a side elevation of a reciprocating pump the water cylinder of which is broken away to disclose the piston.

Fig. 2 is an elevational view of the piston partly broken away to show the interior mechanism thereof.

Fig. 3 is a longitudinal central section through the piston and its rod and showing parts in elevation.

Fig. 4 is a transverse section on line 4-4 of Fig. 3.

Fig. 5 is a transverse section through the piston on line 5-5 of Fig. 3 showing only the piston element.

Fig. 6 is a detail edgeview of one of the split piston rings provided with an interlocking nog.

Fig. 7 is a longitudinal section of a portion of the piston rod showing means for automatically actuating the take up device.v

of the frame 6. The rod 4 reciprocates through a gland 7 in one end of the cylinder 3 and the opposite end of the cylinder is provided with a removable head 8 to permit the assembly of the pump organization.

It is ordinarily the practice to remove the removable head of the pump or engine in which a piston is mounted when it is desired to replace the packing in the piston because of wear of the packing and this necessitates the removal of the piston also, and the object of this inventionis to avoid the removal of the parts in this manner.

While this may be accomplished in various forms of devices embodying my invention, the piston 2 is hereshown as having a central tapered bore 2' to receive the re duced end of the piston rod 4 which, in the present case, is hollow or tubular, and there is turnably mounted in the same a rod or screw 9 the outer end of which may be provided with a worm wheel 10 located in a chamber 11 at one end of the rod 4, and the worm wheel or gear 10 is designed to be engaged with a complementary pinion 12. in this case, extending tangentially with respect to the pinion 10 and is formed or mounted on a short piece of shaft 13 ex tending outwardly and being mounted in a bushing or bearing 14 tapped or otherwise mounted in the body of the rod 4 as at 15.

The outer end "of the bushing 14 is provided with a packing chamber to receive a packing held in place and compressed by an adjustable gland 16 through which the outer end of the shaft. or stem 18 extends. The projecting end is squared as at 13 or otherwise formed for convenient manipulation by a tool to secure the rotation, in one embodiment of the invention, of the screw or rod 9. The outer end of the piston rod 4 in which the chamber is provided has a plug 17 that may be counterbored to form a hearing for the adjacent end of the rod 9, and the exterior of the piston rod 4 may be threaded as at 18 so as to be coupled with an extension or driving rod 19 running in the engine 5.

The piston 2 is formed with. or comprises, a disc 2 fitting on the tapering end of the piston rod 4, and spaced axially from the main member 2 is a complementary or opposite wall or disc a which is centrally bored to be passed on to the adjacent end of the piston rod 4 which is threaded at 4* at one end to take the lock nuts 20 hearing against the adiacent piston disc or wall 2". To maintain the piston member 2 and the end 2 in proper spaced relation a spacing washer or sleeve 21 is mounted on the end of the piston rod 4: between these two members so that the member 2 will be pressed against the bushing or spacing member 21 when the locking nuts 20 are set up.

The threaded portion of the rod or screw 9 is shown as engaged by a diametrically extending dog 22 which passes through diametrically opposite slots 23 provided therefor in the adjacent part of the piston rod 4, and the radial arms of the dog 22 also extend through slots 24 provided in the spacin bushing 21.

ounted upon the bushing 21 for longi tudinal sliding movement there is a split cone-like member hereinafter termed the jack and designated at 25, the jack being split on a diametrical line to form .two sections to permit the same to be readly mounted upon and removed from the piston bushing 21. This cone-like member or jack 25 is of less length than the spacin bushing 21 and is adapted to be shifted orwardly by the rotation of the screw 9 which effects the ion itudinal shifting movement of the dog 22 in the slots 23 and 24, the outer ends of the dog extending intoradial apertures 26 provided therefor in the cone 25, the latter having its exterior surface diverging upwardly and rearwardly.

Surrounding the jack or cone 25 is an expansible body of substantially circular form and of slightly less length than the length of the bushing 21 and this body is shown in Fig. 2 as comprising a plurality of independently radially movable sections 27 here shown as four in number and having a central bore complementary to the con-' ical surface of the jack device 25.

To prevent circumferential rotation of the expansible body 27 in the seat between the discs 2 and 2 of the piston one orv the other of the adjacent faces of these members can be suitably interlocked with the adjacent face of each section of the expansible body 27 and in this case each section of the body 27 is rebated as at 28 radially to receive a complementary radial lug 29 formed in this case on the adjacent face of the piston disc 2.

Surrounding the expansible sectional body 27 are a plurality of suitable split resilient packing rings 30 of suitable or ordinary character these extending from face to face of the adjacent piston members 2 and 2", and upon these resilient packing rings 30 there is built up or placed a body of an appropriate packing material substantially of annular form indicated at 31 built up to the diameter of the piston and designed to be expanded into-c ntact with the surface of the cylinder chamber in which the piston reciprocates.

It is desirable to prevent the individual packing rings from circumferentially shifting with the staggered relation of their respective joints and, therefore, suitable interlocking means is provided comprising a small nog or inwardly extending projection 32 on the inner face of a ring 30, Fig. 6, this nog being designed to engage a complementary recess or seat 33 provided therefor in the outer surface of the various sections of the expanding body 27.

From the above it will be seen that as wear takes place in the cylinder chamber and as the packing 31 is Worn down the latter may be expanded at any time by the application of a tool to the stem or shaft 13 extending from the piston rod 4 and thereby turning the screw or rod 9 to shift the dog 22 axially and likewise shift the expanding jack 25 which, reacting against the sections of the expansible body 27 increases the diameter of the same and thus expanding the rings 30 on which the packing material 31 is arranged. This expansion of the rings 30 in turn forces the packing material 31 outwardly into snug bearing fit with the wall of the cylinder.

It is desirable thatmeans be provided for automatically taking up the wear of the packing 31 and this may be accomplished in a modified form of the invention as illustrated in Fig. 7 wherein the screw rod 9 is designed to be constantlyunder the turning force of a suitable device as a helical spring 35 surrounding the body of the rod 9 and having one end, attached thereto as at 36; the opposite end of the spring 35 being secured as in the bushing 17. When the wear taking device is installed the spring 35 will be placed under torsional'tension and therefore would react on its connection -wi'th the rod 9 to rotate, the latter, and this rotation would in turn tend to shift dog 22 with the cone 25 substantially forwardly against the pressure superposed by the packing 31 on the intermediate devices, the packing being constantly pressed outwardly by the action of the automatic device or spring 35.

Various changes may be made without departing from the spirlt of our invention as claimed.

We claim: V

1. The combination of a piston, a hollow piston rod, a packing, an expansible body formed with an inclined inner surface, acks slidably mounted within the piston formed with inclined outer surface for .en-

gaging the inclined inner surface of said respect to each other to maintain piston rod, one end of said sod being threaded and screwing into said dog, a worm on the other end of said rod, a shaft journaled in said piston rod, a worm on said shaft meshing with said worm on said rod, and means whereby said shaft may be turned.

2. The combination of a piston, a hollow piston rod, a packing, an expansible body formed with an inclined inner surface, jacks slidably mounted Within the piston formed with inclined outer surface for engaging the inclined inner surface of said expansible body, a slidable dog engaging said jacks, a rod turnably mounted in the piston rod, one end of said rod being in threaded engagement with said do a plug screwed into "the end of the piston rod in which plug the other end of said rod is journaled, and means for rotating said rod.

3. The combination of a piston, a hollow piston rod; a pair of piston discs, a sleeve on the piston rod between said discs, means for drawing said discs together on said rod against the ends of said sleeve, a jack slidable on said sleeve, a rod journaled at one end in the piston rod, said piston rod and said sleeve being provided with registering transverse openings, a dog extending through said openings and engaging said jack, the other end of said rod being in threaded engagement with said dog, said jack being formed with an inclined surface, an expansible body formed with an inclined surface co-acting with the inclined surface of said jack, a packing between said discs surrounding said body, and means for rotating said rodto cause said co-acting surfaces to expand said body and said packing.

4. The combination of a piston, a hollow iston rod, a packing, an expansible body ormed with an inclined inner surface, jacks slidably mounted within the piston formed with inclined outer surface for engaging the inclined inner surface of said expansible 'f body, a slidable dog enga 'ng said jacks, a rod turnably mounted in t e piston rod, one end of said rod being threadecLand screwing into said dog, and means projecting-outwardly from the side and between the ends of said piston rod and adapted to rotate said rod. 7 Y

5. The combination of a iston, a piston rod, a packing, an expansib e body formed. with an inclined inner surface, means slidably mounted within the piston for engaging, the inclined inner surface of said expansible body, a rotatable rod mounted in the piston rod, a dog engaging said means and screw threaded on said rotatable rod for longitudinal movement, means for holding said rotatable rod against longitudinal movemtzlnt, and means for rotating said rotatable ro L r 6. In combination with a I cylinder, a rod extending-unto the cylinder,

and a piston on nection with said member so the rod in the cylinder, expansible packing carried by the piston, a packing operating mechanism adapted to be actuated by linear movement of one of its parts to expand the packing, a member carried by the rod for rotation on] means actuated by rotation of said mem .er to cause linear movement of said packing operating mechanism part, and means operatable from a point outside of the cylinder to cause rotation of said mem- 7. In combination with a piston and a hollow piston rod, expansible packing carried by the piston, a packing operating mechanism adapted to be actuated by linear movement of one of packing, a member carried in the piston rod for rotation only, and a member screw threaded on the rotatable member and havmg engagement with said part so that rotaits parts to expand the tion of said rotatable member causes it to move lineally and cause lineal movement of said part.

8. In combination with a piston and pieton rod, expansible packing carried by the piston, a packing operating mechanism for expanding the packing, means carried by the piston rod for operating said mechanism, and means outside of the cylinder for operating said member, said means embodying a shaft extending transversely of the rod to be operated from one side of the rod.

9. In combination with a piston, expansible packing, operating means for expanding the packing including a rotatable member, a screw thread connection between the packing expanding means and said member whereby said means is actuated by rotation of said member, and a worm gear mechanism for rotating said member.

10. In combination with a piston and piston rod, expansible packing carried by the piston, a packing operating mechanism or expanding the packing, a member carried by the piston rod for operating said mechanism, and a member extending from one side of the piston rod and having conthat it causes operation of said member upon being operated.

11. In combination with a" piston and a hollow piston rod, packing carried by the piston, operating means for expanding the packing, a -member rotatably mounted in the piston rod and operatively connected with said means, a worm gear mounted on said member and operatively connected with said member, a shaft rotatabl the piston rod, and a worm mounted on the shaft to co-operate with the worm gear.

12. In combination, a hollow piston rod, two rod etween. theplates, means for-holding the plates together against the ends of the sleeve, expansible packing carried between plates carried on the rod, a sleeve on the.

Hill) y carried by the periphery portions of the plates, an exrod and extending through the openings to pansible body within the packing, a wedge engage the wedge, and means for rotating slidably carried on the sleeve to co-operate the rotatable rod. 1 with said body to expand it, a rod rotatable In testimony whereof we have signed our It in the piston rod, the piston rod and sleeve names to this sgecifieation. being provided with registering openings, a ROVER C. DEAKINS.

member screw threaded on the rotatable LELAND S} HAMER. 

